Cutting tool with replaceable teeth

ABSTRACT

The specification discloses a cutting tool having at least one tooth. The tooth is supported in a cutter support in a notch and has a threaded stud passing through a wedge key clamping the tooth in place. The tooth bottoms on a rib having a curved top.

United States Patent 1191 Hamilton 1 Jan. 9, 1973 [541 CUTTING TOOL WITH REPLACEABLE 3,408,722 11/1968 Berry, .lr ..29/1os TEETH 3,481,015 12/1969 Bogner ..29/105 2,224,173 l2/I94O Weddell ..29/l05 [76] Inventor: Martin Norman Hamilton, R.D. No.

4, Meadville, Pa. 16335 FOREIGN PATENTS OR APPLICATIONS [22] Filed: March 30, 1970 1,921,532 4/1969 Germany ..29 105 [21] Appl' 23615 Primary Examiner-Harrison L. I-li'n'son Attorney-Charles L. Lovercheck [52] US. Cl. ..29/l05 A [51] Int. Cl. ..B26d 1/12 [57] ABSTRACT [58] Field of Search ..29/l05, 105 A The specification discloses a cutting tool having at least one tooth. The tooth is supported in a cutter sup- [56] References Cited port in a notch and has a threaded stud passing UNITED STATES PATENTS through a wedge key clamping the tooth in place. The

' tooth bottoms on a rib having a curved top. 3,104,453 9/1963 Greenleaf ......29/l05 3 Claims, 3 Drawing Figures PATENTEDJAH 9 1915 SHEET 1 0F 2 Jwumvto a '/V. H MILra/v MARTIN CUTTING TOOL WITH REPLACEABLE TEETH OBJECTS OF THE INVENTION It is an object of the invention to provide an improved cutting tool and support.

Another object of the invention is to provide a cutting tool and support in combination which is simple in construction, economical to manufacture, and simple and efficient to use.

Another object of the invention is to provide an improved cutting tool with replaceable teeth.

Another object is to provide an improved tooth clamp structure.

DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view of the device according to the invention.

FIG. 2 is a side view of the cutter.

FIG. 3 is a top view of the cutter.

DETAILED DESCRIPTION OF THE DRAWINGS The cutter is shown having notches 11 spaced around it. The cutter wheel can have one notch or one or more notches arranged in a circular configuration to make up a cutting wheel as shown. The notches are spaced the proper distance to provide the desired number of teeth in the holder 10. The teeth 14 are held in place by keys 12 which are clamped in the notches l 1 by the stud 13. The teeth 14 are generally non-circular or rectangular in shape and may be made of hardened material so that the outer end can be ground to provide a cutting edge. The threaded hole 15 is provided at the bottom of the notch and the tooth 14 has a hole which receives the stud 13. The stud 13 is threadably received in the threaded hole 15 in the support.

The notch has a flat side 16 parallel to center bore and a side 17 and a bottom 26 that has a radially extending rib 31 across its top spaced above the bottom 26 of the notch.

The tooth has a bottom 18, sides 19 and 20, and a top 21.

The key 22 has an end 24 and a bottom 26, and a tapered side 23 which is inclined relative to the side 24, and side 24 being parallel to the axis of the hole 25, 30.

i A surface 28 and another surface 29 engage the end surfaces of tooth l4 and a cylindrical part in the support. The key 22 has sides 23 and 24 and a hole 25, a bottom 26 and a cylindrical part 27. Notch bottom 34 is spaced below the lower end of the key. Thus when the stud 13 is received in the hole 25, which is machined to receive the head-36 of the stud, the key can be clamped-into place alongside the tooth side 19. Inclined lower edge 18 of tooth 14 will rest on the rib lows:

1. In combination, a cutting tool and holder for supporting said tool on a machine,

said tool comprising a generally non-circular or rectangular member having an end adapted to be sharpened, said holder having a notch formed in itadapted to receive said tool having side surfaces that are parallel to each other,

a wedge key member,

an inclined surface on said holder adapted to engage a side of said key member, a threaded member extending through a hole in said key and engaging a threaded hole in said holder clamping said key to said holder, the bottom of said notch having a rib thereon' with an arcuate top surface on which an end of said tool rests, said key having an inclined side engaging one side of I said parallel sides of said tool, said holder has an axis and said notch has one side having a compound angle relationship to an axis of said holder, I

and said inclined surface comprises one side of said notch,

said notch having'a compound angle relationship to said hole, said holder has a cylindrical bore communicating with said notch,

and said key has a cylindrical part having an outside surface complimentary in shape to said cylindrical bore, and said bore is concentric to said cylindrical member,

a flat surface is formed on a side of said cylindrical member,

said flat surface being inclined to the axis of said cylindrical. member at an angle approximately equal to the incline of said surface on said clamping member and an end of said tool engages said flat surface on said key.

2. The combination recited in claim 1 wherein a plurality of saidteeth are disposed on said holder and said holder comprises a round member.

3. The combination recited in'claim 2 wherein said teeth extend outwardly from an end of said holder. 

1. In combination, a cutting tool and holder for supporting said tool on a machine, SAID TOOL COMPRISING A GENERALLY NON-CIRCULAR OR RECTANGULAR MEMBER HAVING AN END ADAPTED TO BE SHARPENED, SAID HOLDER HAVING A NOTCH FORMED IN IT ADAPTED TO RECEIVE SAID TOOL HAVING SIDE SURFACES THAT ARE PARALLEL TO EACH OTHER, A WEDGE KEY MEMBER, AN INCLINED SURFACE ON SAID HOLDER ADAPTED TO ENGAGE A SIDE OF SAID KEY MEMBER, A THREADED MEMBER EXTENDING THROUGH A HOLE IN SAID KEY AND ENGAGING A THREADED HOLE IN SAID HOLDER CLAMPING SAID KEY TO SAID HOLDER, THE BOTTOM OF SAID NOTCH HAVING A RIB THEREON WITH AN ARCUATE TOP SURFACE ON WHICH AN END OF SAID TOOL RESTS, SAID KEY HAVING AN INCLINED SIDE ENGAGING ONE SIDE OF SAID PARALLEL SIDES OF SAID TOOL, SAID HOLDER HAS AN AXIS AND SAID NOTCH HAS ONE SIDE HAVING A COMPOUND ANGLE RELATIONSHIP TO AN AXIS OF SAID HOLDER, AND SAID INCLINED SURFACE COMPRISES ONE SIDE OF SAID NOTCH, SAID NOTCH HAVING A COMPOUND ANGLE RELATIONSHIP TO SAID HOLE, SAID HOLDER HAS A CYLINDRICAL BORE COMMUNICATING WITH SAID NOTCH, AND SAID KEY HAS A CYLINDRICAL PART HAVING AN OUTSIDE SURFACE COMPLIMENTARY IN SHAPE TO SAID CYLINDRICAL BORE, AND SAID BORE IS CONCENTRIC TO SAID CYLINDRICAL MEMBER, A FLAT SURFACE IS FORMED ON A SIDE OF SAID CYLINDRICAL MEMBER, SAID FLAT SURFACE BEING INCLINED TO THE AXIS OF SAID CYLINDRICAL MEMBER AT AN ANGLE APPROXIMATELY EQUAL TO THE INCLINE OF SAID SURFACE ON SAID CLAMPING MEMBER AND AN END OF SAID TOOL ENGAGES SAID FLAT SURFACE ON SAID KEY.
 2. The combination recited in claim 1 wherein a plurality of said teeth are disposed on said holder and said holder comprises a round member.
 3. The combination recited in claim 2 wherein said teeth extend outwardly from an end of said holder. 